Question

display tag -source forge (taglib)

Asked by: EdwardPeter

Hi,

Please kindly assist what changes needs to be on the code below to incorporate the new tablib

I'm not sure how to join the new tag lib code

http://displaytag.sourceforge.net/tut_sources.html (bottom part)

--------------------------------------------------------------new tag lib (integrate with the old jsp page)
<%
Connection con = ...; // just open a connection

Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from table");
RowSetDynaClass resultSet = new RowSetDynaClass(rs, false);
stmt.close();
con.close();
request.setAttribute("results", resultSet);
%>

--------------------------------------------------------------old jsp page

<code>
<%@ page import="java.sql.*, com.my.beans.*" %>
<jsp:useBean id="beanconnection" class="com.my.beans.ConnectionBean" scope="request"/>
<html>
<body>
<%
String sql = "Select ID,Name from employees" ;
ResultSet rs = beanconnection.executeQuery(sql) ;
%>
<%
while ( rs.next() ){
%>
A line of db stuff <%= rs.getString("Name") %>
<%
}
%>
</body>
</html>
</code>

Thanks

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Asked On: 2005-10-14 at 08:59:11ID21595309
Topics: Java Programming Language
,; Java Standard Tag Library (JSTL) & Server Tags
Participating Experts: 1
Points: 500
Comments: 40

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Answers

by: kawasPosted on 2005-10-14 at 09:07:32ID: 15086623

what are you trying to do exactly? query a database?

It looks to me that one you download the library and place it in your webapps/serviceName/WEB-INF/lib directory you can replace:

<%
String sql = "Select ID,Name from employees" ;
ResultSet rs = beanconnection.executeQuery(sql) ;
%>
<%
while ( rs.next() ){
%>
A line of db stuff <%= rs.getString("Name") %>
<%
}
%>

with the new code

by: kawasPosted on 2005-10-14 at 09:09:16ID: 15086639

library here http://jakarta.apache.org/site/downloads/downloads_commons-beanutils.cgi

by: EdwardPeterPosted on 2005-10-14 at 09:10:25ID: 15086645

kawas,

the old code is displaying

A line of db stuff ...
A line of db stuff ...
A line of db stuff ...

how can we display a grid using the new tablib?

I'm not sure which path to choose from. (on the site)

Thanks.

by: EdwardPeterPosted on 2005-10-14 at 09:12:34ID: 15086661

kawas,

Should we go with RowSetDynaClass ?

or there's an easier way on the link?

Thanks.

by: kawasPosted on 2005-10-14 at 09:14:53ID: 15086676

download
http://apache.sunsite.ualberta.ca/jakarta/commons/beanutils/binaries/commons-beanutils-1.7.0.zip

that code will automatically display the table

so

<code>
<%@ page import="java.sql.*, com.my.beans.*" %>
<jsp:useBean id="beanconnection" class="com.my.beans.ConnectionBean" scope="request"/>
<html>
<body>
<%
String sql = "Select ID,Name from employees" ;
ResultSet rs = beanconnection.executeQuery(sql) ;
%>
<%
while ( rs.next() ){
%>
A line of db stuff <%= rs.getString("Name") %>
<%
}
%>
</body>
</html>
</code>

becomes

<code>
<%@ page import="java.sql.*, com.my.beans.*" %>
<jsp:useBean id="beanconnection" class="com.my.beans.ConnectionBean" scope="request"/>
<html>
<body>
<%
Connection con = ...; // just open a connection

Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from table");
RowSetDynaClass resultSet = new RowSetDynaClass(rs, false);
stmt.close();
con.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>
</code>

by: EdwardPeterPosted on 2005-10-14 at 09:34:43ID: 15086829

kawas,

This is great, one question, can you kindly create a sample

Connection con = ...; // just open a connection

I'm not sure what syntax is missing in side.

a u/p, ip, database, connection type?

Thanks.

by: kawasPosted on 2005-10-14 at 09:47:46ID: 15086937

Connection con= null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
/* this specifies the MySQL host, the database to use, and the MySQL
username and password */
con=
DriverManager.getConnection("jdbc:mysql://url:3306/database",
"user","pass");

by: kawasPosted on 2005-10-14 at 09:56:11ID: 15087014

i got the code to work.

you need to download the following libraries:

http://prdownloads.sourceforge.net/displaytag/displaytag-1.0.zip

http://apache.mirror.cygnal.ca/jakarta/commons/lang/binaries/commons-lang-2.1.zip

and the one i mentioned earlier.

you need the following at the top of your page:
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>

and you need to follow these install instructions

http://displaytag.sourceforge.net/install.html

by: EdwardPeterPosted on 2005-10-14 at 10:24:39ID: 15087256

kawas,

I'm using Tomcat 5.5 and mysql 4.1 as server

on my desktop, nitrox is displaying couple of errors..

<code>
<%@ page import="java.sql.*, com.my.beans.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>
<jsp:useBean id="beanconnection" class="com.my.beans.ConnectionBean" scope="request"/>
<html>
<body>

<%
Connection con= null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql://localhost/test","root","pass");

Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from table");
RowSetDynaClass resultSet = new RowSetDynaClass(rs, false); <--red underline error (cannot be resolve to a type)
stmt.close();
con.close();
request.setAttribute("results", resultSet);
%>
<display:table name="requestScope.results.rows" /> <-------yellow underline error(the tei class org.displaytag.tag.TableTagExtraInfo.is not in the applciation class path.)

</body>
</html>
</code>

by: kawasPosted on 2005-10-14 at 10:31:34ID: 15087305

have you installed all of the libraries?

in the WEB_INF/lib directory, i added the following libs:
commons-beanutils.jar
commons-beanutils-bean-collections.jar
commons-beanutils-core.jar
commons-lang-2.1.jar
displaytag-1.0.jar

in the WEB-INF/ directory I added (came from display tag):
displaytag-11.tld
displaytag-12.tld
displaytag-el-12.tld

added the following import

<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>

restart your server

and try again. My editor didnt like that statement either.

Make sure that you start up mysql and that you also have the sql connector in you WEB-INF/lib directory

by: kawasPosted on 2005-10-14 at 10:33:45ID: 15087315

one last thing, i removed the <code> tag as well as the </code> tag

by: kawasPosted on 2005-10-14 at 10:35:47ID: 15087332

another last thing,

make sure that database is a valid database name and that table is a table in the database and you might want to add the port 3306 to localhost in the url (localhost:3306) ("jdbc:mysql://localhost/test","root","pass")

by: EdwardPeterPosted on 2005-10-14 at 10:50:48ID: 15087461

kawas,

Do you have a .java file created? can you please post the code inside?

Thanks.

by: kawasPosted on 2005-10-14 at 10:53:52ID: 15087489

why would there be a java file? it should be .jsp

<html>
<head><title>Query Results</title></head>
<body>

<%@ page import="java.sql.*" %>
<%@ page import="org.apache.commons.beanutils.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>

<%
Connectionconnection = DriverManager.getConnection("jdbc:mysql://localhost:3306/myDB","root","root");

Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from object");
RowSetDynaClass resultSe2 = new RowSetDynaClass(rs, false);
stmt.close();
connection.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>

by: kawasPosted on 2005-10-14 at 10:55:28ID: 15087512

<html>
<head><title>Query Results</title></head>
<body>

<%@ page import="java.sql.*" %>
<%@ page import="org.apache.commons.beanutils.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>

<%

Connection connection = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/myDB","root","root");

Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from object");
RowSetDynaClass resultSe2 = new RowSetDynaClass(rs, false);
stmt.close();
connection.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>

by: kawasPosted on 2005-10-14 at 10:58:10ID: 15087539

i really am mucking it up. sorry, i was trying to remove other code from the file and kept pasting code from the wrong section

<%@ page import="java.sql.*" %>
<%@ page import="org.apache.commons.beanutils.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>
<html>
<head><title>Query Results</title></head>
<body>

<%

Connection connection = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/myDB","root","root");

Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from object");
RowSetDynaClass resultSe2 = new RowSetDynaClass(rs, false);
stmt.close();
connection.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>

by: kawasPosted on 2005-10-14 at 10:59:45ID: 15087551

oh boy, one last time

<%@ page import="java.sql.*" %>
<%@ page import="org.apache.commons.beanutils.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>
<html>
<head><title>Query Results</title></head>
<body>

<%

Connection connection = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/myDB","root","root");

Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from object");
RowSetDynaClass resultSet = new RowSetDynaClass(rs, false);
stmt.close();
connection.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>

by: kawasPosted on 2005-10-14 at 11:00:39ID: 15087558

that one works. no spelling mistakes or mis spelled variables ;-)

by: EdwardPeterPosted on 2005-10-14 at 11:13:54ID: 15087674

kawas,

few error meesage:

Error message:The import org.apache.commons cannot be resolved

>>
<%@ page import="org.apache.commons.beanutils.*" %>
<<

by: kawasPosted on 2005-10-14 at 11:17:52ID: 15087709

did you download the libraries i named above?

by: EdwardPeterPosted on 2005-10-14 at 11:28:51ID: 15087816

kawas,

yup, I followed your advice,
Error message:The import org.apache.commons cannot be resolved

still persist <%@ page import="org.apache.commons.beanutils.*" %>

Thanks.

in the WEB_INF/lib directory,
commons-beanutils.jar
commons-beanutils-bean-collections.jar
commons-beanutils-core.jar
commons-lang-2.1.jar <-------------------------i have 2.0.jar (this is the only version i saw)
displaytag-1.0.jar

in the WEB-INF/ directory
displaytag-11.tld
displaytag-12.tld
displaytag-el-12.tld

in the WEB-INF/lib
mysql connector 3.1.11-bin.jar

by: EdwardPeterPosted on 2005-10-14 at 11:50:05ID: 15087994

kawas,

when I run the project, error message:

exception
javax.servlet.ServletException: org/apache/commons/collections/IteratorUtils
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
      org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:88)
      org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
      org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
      org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
      org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NoClassDefFoundError: org/apache/commons/collections/IteratorUtils
      org.displaytag.tags.TableTag.initParameters(TableTag.java:841)
      org.displaytag.tags.TableTag.doStartTag(TableTag.java:623)
      org.apache.jsp.index_jsp._jspx_meth_display_table_0(org.apache.jsp.index_jsp:104)
      org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:78)
      org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
      org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
      org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
      org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

by: kawasPosted on 2005-10-14 at 11:51:31ID: 15088009

http://apache.mirror.cygnal.ca/jakarta/commons/lang/binaries/commons-lang-2.1.zip is for 2.1

apparently you may need the commons-collections as well
http://apache.mirror.rafal.ca/jakarta/commons/collections/collections-current.zip

other than that, it looks good. if the error persists, look into the /tomcat/logs/localhost***.txt log file to see what is really wrong

by: kawasPosted on 2005-10-14 at 11:52:34ID: 15088020

ah, definitely need the commons-collection library. then you will be on your way!

by: EdwardPeterPosted on 2005-10-14 at 11:54:22ID: 15088036

kawas,

Finish downloading, would you happen to know where we need to place the collections-current files?

is it /WEB-INF/ ?

Thanks.

by: kawasPosted on 2005-10-14 at 11:56:29ID: 15088057

in the lib directoy add the commons-collections3.1.jar

Ed

by: EdwardPeterPosted on 2005-10-14 at 12:13:36ID: 15088217

kawas,

sad to say still same error as posted above.

please kindly see link for files in lib http://geocities.com/eeforupload/lib.bmp

maybe you have added something in web.xml ?

web server is on tomcat 5.5 and mysql 4.1

Thanks.

by: kawasPosted on 2005-10-14 at 12:18:25ID: 15088264

i didnt add anything to my web.xml file. i also have the same version of tomcat as you.

you should remove all non jar files from your /lib/ directory.

can you post your code again so i can try it

by: EdwardPeterPosted on 2005-10-14 at 12:18:47ID: 15088268

kawas,

Please kindly see below for the last 100 line in catalino.out file

http://pastebin.com/393740

by: EdwardPeterPosted on 2005-10-14 at 12:21:52ID: 15088292

<%@ page import="java.sql.*" %>
<%@ page import="org.apache.commons.beanutils.*" %>
<%@ taglib uri="http://displaytag.sf.net" prefix="display" %>
<html>
<head><title>Query Results</title></head>
<body>

<%

Connection connection = null;
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","pass");

Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * from employees");
RowSetDynaClass resultSet = new RowSetDynaClass(rs, false);
stmt.close();
connection.close();
request.setAttribute("results", resultSet);
%>

<display:table name="requestScope.results.rows" />
</body>
</html>

by: kawasPosted on 2005-10-14 at 12:32:19ID: 15088375

change "org.gjt.mm.mysql.Driver" to "com.mysql.jdbc.Driver" and try again.

if that doesnt work, can you show me your trace again?

by: kawasPosted on 2005-10-14 at 12:37:20ID: 15088407

your code works fine. can i see your web.xml?

by: EdwardPeterPosted on 2005-10-14 at 12:42:26ID: 15088443

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
      version="2.4">

      <display-name>Web Application</display-name>

      <context-param>
            <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
            <param-value>resources.application</param-value>
      </context-param>
      <welcome-file-list>
            <welcome-file>index.jsp</welcome-file>
      </welcome-file-list>

      <jsp-config>
            <taglib>
                  <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
                  <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
            </taglib>
            <taglib>
                  <taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
                  <taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
            </taglib>
            <taglib>
                  <taglib-uri>http://java.sun.com/jsp/jstl/sql</taglib-uri>
                  <taglib-location>/WEB-INF/tld/sql.tld</taglib-location>
            </taglib>
            <taglib>
                  <taglib-uri>http://java.sun.com/jsp/jstl/xml</taglib-uri>
                  <taglib-location>/WEB-INF/tld/x.tld</taglib-location>
            </taglib>
            <taglib>
                  <taglib-uri>http://java.sun.com/jsp/jstl/functions</taglib-uri>
                  <taglib-location>/WEB-INF/tld/fn.tld</taglib-location>
            </taglib>
      </jsp-config>
      </web-app>

by: EdwardPeterPosted on 2005-10-14 at 12:47:10ID: 15088476

kawas,

I can feel were getting closer, That means, i'm missing some files ?

here are the problems listed in Nitrox: (paste then in notepad)

Severity      Description      Resource      In Folder      Location      Creation Time      Id
2      RowSetDynaClass cannot be resolved to a type      index.jsp      datagrid/web            October 14, 2005 3:40:07 PM      74
2      The import org.apache.commons cannot be resolved      index.jsp      datagrid/web            October 14, 2005 2:33:50 PM      61
1      The tei class org.displaytag.tags.TableTagExtraInfo is not in the application class path.      index.jsp      datagrid/web            October 14, 2005 2:33:50 PM      60

Thanks.

by: kawasPosted on 2005-10-14 at 12:52:11ID: 15088524

add

<taglib>
<taglib-uri>http://displaytag.sf.net</taglib-uri>
<taglib-location>/WEB-INF/displaytag-12.tld</taglib-location>
</taglib>

to your jsp-config section of the web.xml

by: kawasPosted on 2005-10-14 at 12:53:13ID: 15088531

also, it seems that yuo are using eclipse. did you add the libs that you downloaded to your projects buildpath?

by: EdwardPeterPosted on 2005-10-14 at 12:53:50ID: 15088538

kawas,

Amazing!!!

you're simply the best, one question though, how come i dont see any colors on the grid?

alternating colors...

Thanks.

by: kawasPosted on 2005-10-14 at 12:59:47ID: 15088580

i think that you will need to associate a css style sheet with the table.
http://displaytag.sourceforge.net/tut_style.html

in the displaytag.zip that contained the jar file that you added to your WEB-INF/lib/ directory, there were some examples. Look at how they use css or create tables.

by: EdwardPeterPosted on 2005-10-14 at 13:00:58ID: 15088587

kawas,

Thanks so much for your time and patience.

by: kawasPosted on 2005-10-14 at 13:02:01ID: 15088593

no problem.

good luck

20120131-EE-VQP-002

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display tag -source forge (taglib)

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Java Programming Language

Java Standard Tag Library (JSTL) & Server Tags

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